Document Detail


The mechanism of sex determination in Rumex acetosella.
MedLine Citation:
PMID:  24430525     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Cytogenetic studies were made with particular emphasis on the sex-determining mechanism in Rumex acetosella (6 x = 42) and its hybrids (F 1, F 2, BC 1 and BC 2) with R. hastatulus (synthetic 4 x = 16 = 4 A +4 X = ♀ and 4 x = 18 = 4 A + 2 (X Y 1 Y 2) = ♂). Rumex acetosella was almost strictly dioecious with 50∶50 male and female. Breeding tests revealed that the males were heterogametic. The longest chromosomes (S), usually two, are the sex chromosomes of this hexaploid species. The S chromosomes are homomorphic in both male and female. The sex chromosome: autosome ratios, and the strong epistatic male effect of the S (M) chromosome in the polyploid dioecious species and in the hybrids, are evidence of an X/Y Melandrium type sex-determining mechanism controlled by a single pair of homomorphic sex chromosomes. Thus, the sex chromosome formula of the males was S (F) S (M) and that of females was S (F) S (F). The present approach is a new method for resolving the sex-determining mechanism in a dioecious species.
Authors:
R B Singh; B W Smith
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik     Volume:  41     ISSN:  0040-5752     ISO Abbreviation:  Theor. Appl. Genet.     Publication Date:  1971 Jan 
Date Detail:
Created Date:  2014-01-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0145600     Medline TA:  Theor Appl Genet     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  360-4     Citation Subset:  -    
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